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Dear Mr. Mann:
This is in response to your letter of November 2 informing us that the Mexican Commissioner, International Boundary and Water Commission has advised that for legal reasons his Government accept a permanent solution to the salinity problem based on a 1.5:1 salt balance for the Wellton-Mohawk Irrigation and Drainage District. Instead it is our understanding that the Mexican Commissioner has proposed a bypass solution based on 5 major points as outlined on page 2 of your letter.
In general principle these points appear acceptable. However, if we are to avoid the release of stored water to make up for drainage effluent bypassed during the period October 1 to February 13 each winter, it will be necessary for the minimum rate of flow reaching the boundary section of the river, as mentioned in item 4, to be reduced to approximately 750 cfs. :note: If varying flows of 50 to 1050 cfs are agreeable to Mexico We believe that a mean flow of as much as 850 cfs Could he accomplished without the release of stored water. The future reduction in minimum winter flow is expected to ?? from our continuing the water conservation program initiated last summer.:/note: At a rate of 900 cfs during this period, it is estimated that the release of approximately 45,000 acre-feet of stored water would be required during the winter months.
Item 5 should be stated in terms of a general objective and not as a fixed commitment on a month-by-month or week-by-week basis. The total salts evacuated the summer of 1964 do not reflect normal conditions in that wells in the tiled areas were not pumping and ground water had not yet reached the tile lines. With either wells or tiles operating greater quantities of salt will be evacuated from these areas during like periods in future years.

Dear Mr. Mann:
This is in response to your letter of November 2 informing us that the Mexican Commissioner, International Boundary and Water Commission has advised that for legal reasons his Government accept a permanent solution to the salinity problem based on a 1.5:1 salt balance for the Wellton-Mohawk Irrigation and Drainage District. Instead it is our understanding that the Mexican Commissioner has proposed a bypass solution based on 5 major points as outlined on page 2 of your letter.
In general principle these points appear acceptable. However, if we are to avoid the release of stored water to make up for drainage effluent bypassed during the period October 1 to February 13 each winter, it will be necessary for the minimum rate of flow reaching the boundary section of the river, as mentioned in item 4, to be reduced to approximately 750 cfs. :note: If varying flows of 50 to 1050 cfs are agreeable to Mexico We believe that a mean flow of as much as 850 cfs Could he accomplished without the release of stored water. The future reduction in minimum winter flow is expected to ?? from our continuing the water conservation program initiated last summer.:/note: At a rate of 900 cfs during this period, it is estimated that the release of approximately 45,000 acre-feet of stored water would be required during the winter months.
Item 5 should be stated in terms of a general objective and not as a fixed commitment on a month-by-month or week-by-week basis. The total salts evacuated the summer of 1964 do not reflect normal conditions in that wells in the tiled areas were not pumping and ground water had not yet reached the tile lines. With either wells or tiles operating greater quantities of salt will be evacuated from these areas during like periods in future years.